"Lightsworn Barrier" is an excellent card to use to protect this card as in the right Lightsworn deck it will shield "Shire, Lightsworn Spirit" long enough from destruction by battle to progressively gain attack as more cards are milled by this card (and other card effects, including "Shire").

It's possible to increase the ATK of this card to 6100 or 7100 with "Inverse Universe" (with 19 different Lightsworn monsters in your Graveyard, including another "Shire").